Accrued Expenses and Other Long-Term Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Accrued Expenses and Other Long-Term Liabilities [Abstract]

Accrued expenses and other long-term liabilities

Accrued expenses and other long-term liabilities consisted of the following (in millions):



	Accrued Expenses				Other Long- Term Liabilities
	December 31,
	2014		2013		2014		2013
Defined benefit plan liabilities (see Note 14)	$	48	$	30	$	792	$	507
Wage and other employee-related liabilities	294		257		104		97
Uncertain income tax position liabilities, including related penalties and interest (see Note 16) ^(a)	—		—		316		205
Environmental liabilities	26		24		269		277
Accrued interest expense	88		90		—		—
Derivative liabilities	—		13		—		—
Asset retirement obligations	20		5		71		26
Other accrued liabilities	120		103		387		217
Accrued expenses and other long-term liabilities	$	596	$	522	$	1,939	$	1,329

^{___________________________}

^(a)As of December 31, 2014, our total liability for uncertain tax positions, including related penalties and interest, was $484 million, with $168 million classified as a current liability and reflected in “Income taxes payable” and the remaining $316 million classified as a long-term liability and reflected in “Other long-term liabilities” as detailed in this table. As of December 31, 2013, our total liability for uncertain tax positions, including related penalties and interest, was $443 million, with $238 million classified as a current liability and reflected in “Income taxes payable” and the remaining $205 million classified as a long-term liability and reflected in “Other long-term liabilities” as detailed in this table.

Changes in environmental liabilities

Changes in our environmental liabilities were as follows (in millions):



	Year Ended December 31,
	2014			2013			2012
Balance as of beginning of year	$	301		$	269		$	274
Additions to liability	26			67			23
Reductions to liability	—			(1		)	(1		)
Payments, net of third-party recoveries	(27		)	(28		)	(29		)
Separation of retail business	—			(4		)	—
Foreign currency translation	(5		)	(2		)	2
Balance as of end of year	$	295		$	301		$	269

Changes in asset retirement obligations

Changes in our asset retirement obligations were as follows (in millions).



	Year Ended December 31,
	2014			2013			2012
Balance as of beginning of year	$	31		$	108		$	87
Additions to accrual	60			2			14
Revisions in estimated cash flows	—			—			13
Accretion expense	1			2			5
Settlements	(1		)	(1		)	(11		)
Separation of retail business	—			(80		)	—
Balance as of end of year	$	91		$	31		$	108